Which direction to turn the lower adjuster on the rear shocks to stiffen them up? It's hard to see in there where the detents are and also feels like the probably turn different directions. Just can't remember from the one other time I adjusted them.

Looking up the lower shock perch from underneath, it looks like the longest/tallest detent provides the stiffest ride.  Is that right?

Thanks.  I got 'em adjusted yesterday afternoon and discovered you can accidentally go from 5 to 1 by turning too far, but you can't turn it back. You can see in the pic you provided that it's possible to go from 5 to 1, but not from 1 to 5.  Then, you have to remove the shock, rotate the bottom collar so the adjuster port is back around, remount the shock and continue on.  Just a little FYI tidbit for anyone else.
I need to put on some more miles but this may have resolved the sensation I was feeling; tire must have been hitting on those bumps with the bigger rear tire and softer setting.
Still gonna go for longer shocks if I can find a decent pair for a decent price.  Nothing yet.

Thanks everyone!